|
US2072516A
(en)
|
1934-02-08 |
1937-03-02 |
American Mach & Foundry |
Insert attachment for wrapping machines
|
|
US2230770A
(en)
|
1939-12-09 |
1941-02-04 |
Cons Car Heating Co Inc |
Circuit controller
|
|
US2895472A
(en)
|
1956-01-05 |
1959-07-21 |
Electric Storage Battery Co |
Respirator
|
|
US3613678A
(en)
|
1970-02-24 |
1971-10-19 |
Minnesota Mining & Mfg |
Filtration mask
|
|
US4215682A
(en)
|
1978-02-06 |
1980-08-05 |
Minnesota Mining And Manufacturing Company |
Melt-blown fibrous electrets
|
|
US4441494A
(en)
|
1981-03-02 |
1984-04-10 |
Montalbano Anthony |
Cold weather breathing device
|
|
US4419993A
(en)
|
1981-12-10 |
1983-12-13 |
Minnesota Mining & Manufacturing Company |
Anti-fogging surgical mask
|
|
US4729371A
(en)
|
1983-10-11 |
1988-03-08 |
Minnesota Mining And Manufacturing Company |
Respirator comprised of blown bicomponent fibers
|
|
JPS60168511A
(en)
|
1984-02-10 |
1985-09-02 |
Japan Vilene Co Ltd |
Production of electret filter
|
|
US4536440A
(en)
|
1984-03-27 |
1985-08-20 |
Minnesota Mining And Manufacturing Company |
Molded fibrous filtration products
|
|
US4630604A
(en)
|
1985-04-09 |
1986-12-23 |
Siebe North, Inc. |
Valve assembly for a replaceable filter respirator
|
|
US4807619A
(en)
|
1986-04-07 |
1989-02-28 |
Minnesota Mining And Manufacturing Company |
Resilient shape-retaining fibrous filtration face mask
|
|
US5025052A
(en)
|
1986-09-12 |
1991-06-18 |
Minnesota Mining And Manufacturing Company |
Fluorochemical oxazolidinones
|
|
US5099026A
(en)
|
1986-09-12 |
1992-03-24 |
Crater Davis H |
Fluorochemical oxazolidinones
|
|
US4827924A
(en)
|
1987-03-02 |
1989-05-09 |
Minnesota Mining And Manufacturing Company |
High efficiency respirator
|
|
US4934362A
(en)
|
1987-03-26 |
1990-06-19 |
Minnesota Mining And Manufacturing Company |
Unidirectional fluid valve
|
|
US4790306A
(en)
|
1987-09-25 |
1988-12-13 |
Minnesota Mining And Manufacturing Company |
Respiratory mask having a rigid or semi-rigid, insert-molded filtration element and method of making
|
|
US5062421A
(en)
|
1987-11-16 |
1991-11-05 |
Minnesota Mining And Manufacturing Company |
Respiratory mask having a soft, compliant facepiece and a thin, rigid insert and method of making
|
|
US4874399A
(en)
|
1988-01-25 |
1989-10-17 |
Minnesota Mining And Manufacturing Company |
Electret filter made of fibers containing polypropylene and poly(4-methyl-1-pentene)
|
|
US4898174A
(en)
|
1988-05-03 |
1990-02-06 |
Life Support Products, Inc. |
Automatic ventilator
|
|
GB8815179D0
(en)
|
1988-06-25 |
1988-08-03 |
Racal Safety Ltd |
Differential pressure sensor
|
|
GB2221164B
(en)
|
1988-07-26 |
1992-02-12 |
Racal Safety Ltd |
Breathing apparatus
|
|
US4915105A
(en)
|
1988-10-28 |
1990-04-10 |
Lee Tien Chu |
Miniature respiratory apparatus
|
|
DK162426C
(en)
|
1989-09-04 |
1992-03-23 |
Ambu Int As |
PROTECTION AGENT FOR USE BY LUNGE VENTILATION BY ORAL ORAL OR Mouth-to-nose method
|
|
WO1993024181A1
(en)
|
1992-05-29 |
1993-12-09 |
Minnesota Mining And Manufacturing Company |
Unidirectional fluid valve
|
|
US5325892A
(en)
|
1992-05-29 |
1994-07-05 |
Minnesota Mining And Manufacturing Company |
Unidirectional fluid valve
|
|
US5394568A
(en)
|
1993-01-28 |
1995-03-07 |
Minnesota Mining And Manufacturing Company |
Molded head harness
|
|
AU669420B2
(en)
|
1993-03-26 |
1996-06-06 |
Minnesota Mining And Manufacturing Company |
Oily mist resistant electret filter media
|
|
US5465712A
(en)
|
1993-07-30 |
1995-11-14 |
Valley Forge Scientific Corporation |
Resuscitation mask having ribs in the air flow conduit and mask body
|
|
EP0845554B1
(en)
|
1993-08-17 |
2009-11-18 |
Minnesota Mining And Manufacturing Company |
Method of charging electret filter media
|
|
US5464010A
(en)
|
1993-09-15 |
1995-11-07 |
Minnesota Mining And Manufacturing Company |
Convenient "drop-down" respirator harness structure and method of use
|
|
US6216693B1
(en)
|
1995-01-20 |
2001-04-17 |
3M Innovative Properties Company |
Respirator having a compressible press fir filter element
|
|
US5579761A
(en)
|
1995-01-20 |
1996-12-03 |
Minnesota Mining And Manufacturing Company |
Respirator having snap-fit filter cartridge
|
|
KR100439481B1
(en)
|
1995-03-09 |
2004-11-10 |
미네소타 마이닝 앤드 매뉴팩춰링 캄파니 |
Personal respiratory protection apparatus and method of manufacturing the same
|
|
GB9515986D0
(en)
|
1995-08-04 |
1995-10-04 |
Racal Health & Safety Ltd |
Uni-directional fluid valve
|
|
US5908598A
(en)
|
1995-08-14 |
1999-06-01 |
Minnesota Mining And Manufacturing Company |
Fibrous webs having enhanced electret properties
|
|
US5617849A
(en)
|
1995-09-12 |
1997-04-08 |
Minnesota Mining And Manufacturing Company |
Respirator having thermochromic fit-indicating seal
|
|
USD424688S
(en)
|
1996-09-06 |
2000-05-09 |
3M Innovative Properties Company |
Respiratory protection mask
|
|
USD431647S
(en)
|
1996-09-06 |
2000-10-03 |
3M Innovative Properties Company |
Personal respiratory protection device having an exhalation valve
|
|
US5924420A
(en)
|
1996-09-24 |
1999-07-20 |
Minnesota Mining And Manufacturing Company |
Full face respirator mask having integral connectors disposed in lens area
|
|
US5706804A
(en)
|
1996-10-01 |
1998-01-13 |
Minnesota Mining And Manufacturing Company |
Liquid resistant face mask having surface energy reducing agent on an intermediate layer therein
|
|
US5732695A
(en)
|
1997-03-11 |
1998-03-31 |
Parmelee Industries |
Respirator filtration device
|
|
US6041782A
(en)
|
1997-06-24 |
2000-03-28 |
3M Innovative Properties Company |
Respiratory mask having comfortable inner cover web
|
|
US6213122B1
(en)
|
1997-10-01 |
2001-04-10 |
3M Innovative Properties Company |
Electret fibers and filter webs having a low level of extractable hydrocarbons
|
|
US6238466B1
(en)
|
1997-10-01 |
2001-05-29 |
3M Innovative Properties Company |
Electret articles and filters with increased oily mist resistance
|
|
US6068799A
(en)
|
1997-10-01 |
2000-05-30 |
3M Innovative Properties Company |
Method of making electret articles and filters with increased oily mist resistance
|
|
US6062221A
(en)
|
1997-10-03 |
2000-05-16 |
3M Innovative Properties Company |
Drop-down face mask assembly
|
|
GB9723740D0
(en)
|
1997-11-11 |
1998-01-07 |
Minnesota Mining & Mfg |
Respiratory masks incorporating valves or other attached components
|
|
US6584976B2
(en)
|
1998-07-24 |
2003-07-01 |
3M Innovative Properties Company |
Face mask that has a filtered exhalation valve
|
|
US6047698A
(en)
|
1998-08-20 |
2000-04-11 |
Moldex-Metric, Inc. |
Unidirectional fluid valve
|
|
US6158429A
(en)
|
1998-10-26 |
2000-12-12 |
The United States Of America As Represented By The Secretary Of The Army |
Hood respirator for protection against biological hazards
|
|
USD443927S1
(en)
|
1999-02-17 |
2001-06-19 |
3M Innovative Properties Company |
Respiratory mask
|
|
US7028689B2
(en)
|
2001-11-21 |
2006-04-18 |
3M Innovative Properties Company |
Filtering face mask that uses an exhalation valve that has a multi-layered flexible flap
|
|
US7188622B2
(en)
|
2003-06-19 |
2007-03-13 |
3M Innovative Properties Company |
Filtering face mask that has a resilient seal surface in its exhalation valve
|
|
US7503326B2
(en)
|
2005-12-22 |
2009-03-17 |
3M Innovative Properties Company |
Filtering face mask with a unidirectional valve having a stiff unbiased flexible flap
|
|
US20080178884A1
(en)
*
|
2007-01-25 |
2008-07-31 |
Gerson Ronald L |
Fluid Valve with Center Post
|
|
US8365771B2
(en)
*
|
2009-12-16 |
2013-02-05 |
3M Innovative Properties Company |
Unidirectional valves and filtering face masks comprising unidirectional valves
|
|
US20120125342A1
(en)
*
|
2010-11-19 |
2012-05-24 |
3M Innovative Properties Company |
Filtering face-piece respirator having support structure injection molded to filtering structure
|